Interest is a power. To be successful, we must find the most wanted to do, of course, this is our able to do, so we are able to go to work hard every day,and also likely to be successful. And then a strong will is necessary. Without interest, we are likely to give up when we are boring with something. Without a strong will , we are likely to give up when we meet some difficulties. Straight path in life can not be flat , smooth sailing all the way may be accompanied by rough and rugged , wind and rain , without a strong will , we will lose forward momentum and confidence .